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setjmp.s@ 5c4721b

Last change on this file since 5c4721b was 8325447, checked in by Thomas Lopatic <thomas@…>, 7 years ago
Removed _ prefix.
Property mode set to `100644`
File size: 828 bytes

Line
1	\| ------------------------------------------------------------------------------
2	\| setjmp.s -- Unix(tm) compatible setjmp(env) and longjmp(env,ret)
3	\| Version 3 -- 1987-06-16 -- D.N. Lynx Crowe
4	\| ------------------------------------------------------------------------------
5
6	.text
7
8	.xdef setjmp,longjmp
9
10	setjmp: movea.l 4(a7),a0 \| Get env pointer
11	move.l (a7),(a0) \| Put return address in env
12	movem.l d1-d7/a1-a7,4(a0) \| Save registers in env
13	moveq.l #0,d0 \| Set return value to 0
14	rts \| Return to caller
15
16	longjmp: move.w 8(a7),d0 \| Get ret value
17	bne lj1 \| Jump if non-zero
18
19	moveq.l #1,d0 \| Force return value to 1
20
21	lj1: movea.l 4(a7),a0 \| Get env pointer
22	movem.l 4(a0),d1-d7/a1-a7 \| Restore registers from env
23	move.l (a0),(a7) \| Get return address from env
24	rts \| Return to caller
25
26	.end

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